CN109391066B

CN109391066B - Electric machine

Info

Publication number: CN109391066B
Application number: CN201710682547.8A
Authority: CN
Inventors: 纲岛大辅; 罗尼·科尔; 潘广业; 帕斯奎尔·卡里托
Original assignee: Dechang Motor (Shenzhen) Co Ltd
Current assignee: Dechang Motor (Shenzhen) Co Ltd
Priority date: 2017-08-10
Filing date: 2017-08-10
Publication date: 2020-11-06
Anticipated expiration: 2037-08-10
Also published as: CN109391066A

Abstract

The invention relates to a motor, which comprises a magnetic core and an insulating frame arranged at the axial end of the magnetic core; the magnetic core includes yoke portion and a plurality of teeth that inwards stretch out from yoke portion, the insulating frame includes connecting portion, connecting portion install the axial terminal surface of magnetic core, connecting portion have the connecting piece that is used for the wire winding of connecting winding and be used for leading wire-wound guide piece, the connecting piece is located the position that deviates from the circumference tip that corresponds the tooth, the guide piece is located just to corresponding the position of tooth and is used for leading the wire winding that comes out from the connecting piece so that with the wire winding to correspond the tooth in order to form the winding. The invention can improve the groove fullness rate, prevent the abrasion of the winding and improve the winding efficiency.

Description

Electric machine

[ technical field ] A method for producing a semiconductor device

The invention relates to an electric machine, in particular an electric machine with a magnetic core, a winding and a winding insulation frame.

[ background of the invention ]

Insulating frames are often used in the industry to insulate the stator windings and the stator core. When winding a stator winding, the winding wire is usually first hung on a connecting piece close to the stator teeth on the insulating frame, and then the winding wire is wound on the stator teeth covered with the insulating frame. The scheme can cause that the winding wire is difficult to be attached to the bottom of the tooth groove, the full rate of the groove is reduced, and the winding wire is easy to damage in the winding process.

[ summary of the invention ]

The object of the invention is to improve the slot fill factor of the motor winding and to prevent the windings from being worn.

The invention provides a motor, which comprises a magnetic core and an insulating frame arranged at the axial end of the magnetic core; the magnetic core includes yoke portion and a plurality of teeth that inwards stretch out from yoke portion, the insulating frame includes connecting portion, connecting portion install the axial terminal surface of magnetic core, connecting portion have the connecting piece that is used for the wire winding of connecting winding and be used for leading wire-wound guide piece, the connecting piece is located the position that deviates from the circumference tip that corresponds the tooth, the guide piece is located just to corresponding the position of tooth and is used for leading the wire winding that comes out from the connecting piece so that with the wire winding to correspond the tooth in order to form the winding.

Further, the insulation frame further comprises a plurality of yoke insulation parts and a plurality of tooth insulation parts, wherein the yoke insulation parts are connected to the connecting parts, the yoke insulation parts cover the inner walls of the yokes, and the tooth insulation parts are sleeved to the corresponding teeth along the axial direction and used for separating the winding from the magnetic core.

Further, the yoke portion insulating portions and the tooth portion insulating portions are alternately arranged and sequentially connected to form a ring shape.

Further, the guide and the center line of the corresponding tooth insulating portion are located in the same plane.

Further, the motor comprises a PCB circuit board installed at the axial end of the insulation frame, and the connecting piece is respectively in conductive connection with the PCB circuit board and the winding of the winding, so that the conductive connection between the PCB circuit board and the winding is realized.

Further, the periphery of the PCB circuit board is provided with a first concave position or a first through hole corresponding to the connecting piece for the connecting piece to pass through.

Further, the motor includes a PCB circuit board mounted to an axial end of the insulation holder; the connecting portion is provided with a circuit board mount including a base portion protruding from the connecting portion, the PCB circuit board resting on the base portion.

Further, the circuit board mount is located at a position facing the corresponding tooth, and the circuit board mount or the base serves as the guide.

Furthermore, the circuit board mounting seat is located at a position opposite to the corresponding teeth, the windings are three-phase windings, the number of the connecting pieces is four, two ends of each phase of winding are respectively connected to the two corresponding connecting pieces to form star connection, the starting end of each phase of winding is wound on the corresponding connecting piece, and each phase of winding is wound on the teeth opposite to the guiding pieces or the circuit board mounting seat through the guiding of the adjacent guiding pieces or the circuit board mounting seat.

Furthermore, the positioning part is inserted into the periphery of the PCB and provided with a second concave position or a second through hole, the circuit board mounting seat further comprises a positioning part extending out of the base part, and the positioning part is inserted into the second concave position or the second through hole in the periphery of the PCB.

Further, the magnetic core is a stator magnetic core, and the teeth are stator teeth; the motor includes a rotor mounted in a stator, the rotor including a rotating shaft and a permanent magnet fixed to the rotating shaft.

By implementing the invention, under the matching of the connecting piece and the guide piece, the initial wire turns of the winding can be attached to the bottom of the tooth groove, thereby improving the full rate of the groove, preventing the abrasion of the winding and improving the winding efficiency.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a motor according to an embodiment of the present invention;

FIG. 2 is an exploded schematic view of the motor shown in FIG. 1;

FIG. 3 is a schematic plan view of a stator core, windings, and insulation mounts of the machine of FIG. 1;

FIG. 4 is a plan view of the stator core shown in FIG. 3;

FIG. 5 is a plan view of the insulator frame shown in FIG. 3 mounted to an axial end of a stator core;

FIG. 6 is a perspective view of the insulation frame of FIG. 5;

fig. 7 is a schematic structural diagram of a PCB circuit board, an insulating frame, and a stator core of the motor shown in fig. 1;

FIG. 8 is a plan view of the three-phase winding of the motor of FIG. 1 with corresponding connecting members and guides;

fig. 9 is a schematic view showing a connection relationship among the three-phase winding, the connecting member, and the guide member shown in fig. 8.

[ detailed description ] embodiments

The invention is further described below with reference to the figures and examples.

Referring to fig. 1, the present invention provides a motor 100 including a stator 20 and a rotor 80 installed in the stator 20, wherein the rotor 80 is rotatable relative to the stator 20. The rotor 80 includes a rotating shaft 81, and one end of the rotating shaft 81 extends out of the stator 20 to achieve external driving.

Referring to fig. 2, the stator 20 includes a cylindrical housing 21, an end cap 22 mounted to an open end of the housing 21, a stator core 23 mounted in the housing 21,

insulating holders

25 and 26 respectively mounted to both ends of the stator core 23, a winding 24 wound around the stator core 23, and the like, the winding 24 being separated from the stator core 23 by the

corresponding insulating holders

25 and 26.

The stator 20 further includes an annular PCB circuit board 50 mounted between the insulating frame 25 and the end cap 22. The PCB 50 is provided with a power supply circuit electrically connected to the windings 24 for controlling the operation of the motor 100. The PCB 50 is provided with a connector socket or cable (not shown) for connection to an external power source, and the end cap 22 is provided with a through hole 222 for the connector socket or cable to pass through.

The stator 20 further comprises an insulating sleeve 27 mounted within the cylindrical housing 21 and surrounding the insulating frame 25 and the PCB 50, the insulating sleeve 27 serving to protect the PCB 50 and to prevent unwanted short-circuiting between the PCB 50 and the housing 21. Preferably, the insulating sleeve 27 abuts against an axial end face of the stator core 23, and the outer periphery is substantially flush with the outer wall of the stator core 23.

In this embodiment, the rotor 80 includes a rotating shaft 81, a ring-shaped rotor core (not shown) fixedly sleeved on the rotating shaft 81, and a permanent magnet 83 fixed to the outer periphery of the rotor core, and the permanent magnet 83 is a ring-shaped permanent magnet. The rotor 80 of the present invention is not limited to this structure, and for example, in the alternative, the permanent magnet 83 is a block-shaped permanent magnet embedded in the rotor core, or a permanent magnet directly fixed to the rotating shaft 81 (i.e., the rotor core is not used).

In this embodiment, the rotor 80 further includes two balance discs 82 fixedly sleeved on the rotating shaft 81, and the two balance discs 82 are respectively located at two outer ends of the rotor magnetic core and used for adjusting the center of the rotor 80 to the rotation center of the rotor 80. In addition, the rotor 80 further includes a ring-shaped detection magnet 84 fixedly fitted to the rotation shaft 81, and the detection magnet 84 rotates with the rotor 80 to form a rotating magnetic field when the rotor 80 rotates. Accordingly, a position sensor, such as a hall sensor, is attached to the PCB 50 for sensing the rotating magnetic field of the detection magnet 84, thereby detecting the rotation of the rotor 80.

The rotating shaft 81 is supported by a bearing 221 installed in the end cover 22 and a bearing 211 installed to the bottom of the housing 21 so that the rotor can rotate relative to the stator 20. One end of the rotation shaft 81 protrudes from the bottom of the housing 21 for external driving.

Referring to fig. 3, 4 and 5, the stator core 23 includes a yoke 231 having a ring shape and a plurality of stator teeth 232 inwardly protruding from the yoke 231. A space is formed by enclosing a plurality of stator teeth 232, the rotor 80 is positioned in the space, and an air gap is formed between the permanent magnet 83 of the rotor 80 and the stator teeth 232. A slot 233 is formed between two adjacent stator teeth 232. The

insulating holders

25, 26 are fitted to the stator core 23 from both ends of the stator core 23 in the axial direction, respectively. The winding 24 is wound around the stator teeth 232 covered with the

insulating frames

25, 26 and accommodated in the corresponding slots 233, so that the

insulating frames

25, 26 separate the winding 24 from the stator core 23.

Referring to fig. 5 and 6, the insulation holder 25 has a ring shape as a whole, and includes a ring-shaped connection portion 251, and a plurality of tooth portion insulation portions 252 and a plurality of yoke portion insulation portions 254 connected to one end of the connection portion 251. The connecting portion 251 is attached to an axial end surface of the yoke portion 231 of the stator core 23. Each yoke insulating portion 254 has an arc plate shape, and extends into the corresponding slot 233 to space the winding 24 in the slot 233 from the inner wall of the yoke 232 of the stator core 23 in the slot 233. Each tooth section insulation 252 is axially nested into a corresponding one of the stator teeth 232 and extends into the tooth slot 233, separating the stator teeth 232 from the windings 24. The shape of the tooth insulating portion 252 matches the shape of the tooth body and the tooth crown of the stator tooth 232. The plurality of tooth insulating portions 252 and the plurality of yoke insulating portions 254 are alternately arranged in the circumferential direction and are sequentially connected in a ring shape, thereby separating the windings 24 from the stator core 23 in the slots 233. Preferably, the tooth insulation 252 is recessed in the middle to trap the winding 24 between the connection 251 and the ends of the tooth insulation 252.

In other embodiments, the tooth insulating portion 252 and the yoke insulating portion 254 may be insulating paper.

The structure of the insulating frame 26 is substantially the same as that of the insulating frame 25, and thus, description thereof is omitted.

Referring to fig. 6 and 7, the connecting portion 251 of the insulating holder 25 is mounted with a plurality of connecting members 255 extending in the axial direction of the motor 100 for connecting winding wires, and in this embodiment, there are 4 connecting members 255, which are conductive metal members embedded in the connecting portion 251. The connection 255 is located at a position offset from the circumferential end of the corresponding stator tooth 232, i.e., offset from the tooth insulating portion 252. When winding the winding 24, the winding is hooked to the corresponding connection member 251 and then the corresponding tooth insulating portion 252 is wound.

The ends of the connecting member 255 pass through the first recess 51 or the first through hole of the PCB 50, respectively, and are electrically connected to the circuit inside the PCB 50.

The insulation frame 25 further includes a guide 256 integrally formed on the connection portion 251 and protruding from the connection portion 251, and a plurality of circuit board mounts 257. The guide 256 and the circuit board mount 257 are located in positions facing the corresponding stator teeth 232, i.e., offset from the yoke insulating portion 254. The guides 256 are used to guide the initial turns of the winding 24 into position against the bottom of the tooth slot 233, the circuit board mount 257 is used to support the circuit board 50, and some or all of the circuit board mount 257 may also be used to guide the initial turns of the winding 24 into position against the bottom of the tooth slot 233. The connector 255 is used to hook the beginning or end of the winding wire at a position offset from the circumferential end of the corresponding stator tooth 232 and adjacent the guide 256 (if any) of the corresponding stator tooth 232, the circuit board mount 257 (if any).

For example, referring to fig. 6, after the winding 241 at the start of a certain phase winding 24 is hooked on the connection piece 255a and guided by the adjacent guide 256, the stator teeth 232 corresponding to the corresponding tooth insulating portion 252a start to be wound several turns, and the corresponding winding 24 is wound. The initial turns of the winding 24 guided by the guides 256 can abut the bottom of the tooth slots 233 (i.e., the junction of the tooth insulator 252 and the yoke insulator 254), thereby ensuring slot fill. If the winding wire 241 comes out of the connection piece 255a and then is directly wound around the stator teeth 232, the initial turn of the winding 24 is difficult to be attached to the bottom of the slot 233 due to the deviation of the connection piece 255a from the tooth insulation 242, the slot fullness rate is reduced, and the winding wire 241 may be damaged by colliding with the winding machine and rubbing with the subsequent winding wire 241.

Each circuit board mount 257 includes a base portion 258 formed at the connecting portion 251, and a positioning portion 259 protruding from the base portion 258, the base portion 258 is large in size to form a step at a position connected with the positioning portion 259 for resting the PCB 50, and the positioning portion 259 passes through the second recess 52 or the second through hole of the PCB 50 for positioning and connecting the PCB. Preferably, the circuit board mounts 257 are formed conformally in no less than 2 steps to define a plane to support the PCB circuit board 50.

In this embodiment, the number of the circuit board mounting bases 257 is four, and the four circuit board mounting bases 257 are symmetrical with respect to the center. These circuit board mounts 257 form 4 coplanar steps to support the PCB circuit board 50.

It is understood that the circuit board mounts 257 may be other numbers, and may not be centrosymmetric to define the mounting location of the PCB 50, thereby providing a foolproof design during the assembly of the PCB 50.

The circuit board mount 257 or the base 258 of the circuit board mount 257 may serve as the guide member 256. That is, the guide 256 may be a separate component, or may be the circuit board mount 257 or a portion of the circuit board mount 257.

In this embodiment, the circuit board mounting seat 257 and the guiding element 256 are integrally formed on the insulating frame 25, and the connecting element 255 is a metal element with one end embedded in the insulating frame 25.

Referring to fig. 8 and 9, in the present embodiment, the winding 24 is a star-connected three-phase winding, and the three-phase winding is a U-phase winding, a V-phase winding, and a W-phase winding, respectively. The stator core 23 includes 6 stator teeth 232 so that each phase winding includes two windings wound around two diametrically opposed stator teeth 232, respectively. For convenience of description, the 6 windings are named as a U1 winding, a W1 winding, a V1 winding, a U2 winding, a W2 winding, and a V2 winding, respectively, in the clockwise direction. The number of the connection members 255 is 4, and is named 255a, 255b, 255c, and 255d, respectively, wherein the connection member 255a is connected to one end of the U-phase, V-phase, and W-phase windings, and the other three

connection members

255b, 255c, and 255d are connected to the other end of the U-phase, W-phase, and V-phase, respectively. The winding process of the three-phase winding is as follows:

after the winding comes out of the connection 255b, the winding U1 is formed in the first winding direction after being guided by the adjacent guide member (the circuit board mounting seat 258a is used as the guide member), and then, the winding U2 is formed in the first winding direction and is hung to the connection 255 a. Then, the winding wire comes out of the connector 255a, is guided by the adjacent guide 256, and forms a winding W2 in the second winding direction, and then forms a winding W1 in the second winding direction and is hooked to the connector 255 c. The winding process for the V-phase is similar to that for the U-phase, and the winding comes out of the connector 255d, is guided by the adjacent guide member (the circuit board mount 258b serves as a guide member), forms the winding V1 in the first winding direction, and then forms the winding V2 in the first winding direction and is hung on the connector 255 a. The first direction is opposite to the second direction, e.g., clockwise and counterclockwise, respectively.

Thus, the connection 225a can be used as the start end of the W-phase winding of the three-phase winding and the end of the U, V-phase winding, the connection 255b as the start end of the U-phase winding, the connection 255c as the end of the W-phase winding, and the connection 255d as the start end of the V-phase winding. The starting end of each phase winding is wound on the corresponding connecting piece and then wound from the opposite stator tooth through the adjacent guide piece or the circuit board mounting seat serving as the guide piece, and the guide piece can guide the winding to be attached to the bottom of the corresponding tooth groove and the side edge of the corresponding stator tooth to be wound, so that the full rate of the groove is reduced, and the winding can be prevented from being suspended and damaged due to friction with the subsequent winding.

In other embodiments, the tooth portion insulating portion 252 and the yoke portion insulating portion 254 may be replaced by insulating paper.

The above examples merely represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications, such as combinations of different features in various embodiments, may be made without departing from the spirit of the invention, and these are within the scope of the invention.

Claims

1. An electric machine comprising a magnetic core, an insulating frame mounted to an axial end of the magnetic core; the magnetic core includes yoke portion and inwards a plurality of teeth that stretch out from yoke portion, its characterized in that, the insulation frame includes connecting portion, connecting portion install the axial terminal surface of magnetic core, connecting portion have and are used for articulating the wire-wound connecting piece of winding and are used for guiding wire-wound guide piece, the connecting piece is located the position that the skew corresponds the circumference tip of tooth, the guide piece is located just to correspond the position of tooth and is used for the guide to follow the wire winding that the connecting piece came out so that to coil the wire winding to corresponding tooth in order to form the winding, the insulation frame still includes a plurality of tooth portion insulating parts, tooth portion insulating part is along axial suit to the tooth that corresponds for separate wire winding and tooth, the guide piece is located coplanar with the central line of the tooth portion insulating part that corresponds.

2. The electric machine of claim 1, wherein the insulation bracket further comprises yoke insulation connected to the connection portion, the yoke insulation covering an inner wall of the yoke to separate the winding from the magnetic core.

3. The electric machine of claim 2, wherein the yoke insulators and the tooth insulators are alternately arranged and sequentially connected to form a ring shape.

4. The electric machine of claim 1 including a PCB board mounted to an axial end of said insulation frame, said connector being in conductive communication with said PCB board and windings of said windings, respectively, thereby providing a conductive connection between said PCB board and said windings.

5. The electric machine of claim 4, wherein the PCB circuit board has a first recess or a first through hole corresponding to the connector on its outer periphery for the connector to pass through.

6. The electric machine of claim 1, comprising a PCB circuit board mounted to an axial end of the insulation holder; the connecting portion is provided with a circuit board mount including a base portion protruding from the connecting portion, the PCB circuit board resting on the base portion.

7. The electric machine of claim 6 wherein the circuit board mount is located directly opposite the corresponding tooth, the circuit board mount or the base serving as the guide.

8. The electric machine of claim 6 wherein the circuit board mount is located opposite the corresponding teeth, the windings are three phase windings, the number of connectors is four, the two ends of each phase winding are connected to the corresponding two connectors to form a star connection, and the start of each phase winding is wound around the corresponding connector and then wound around the guide or another tooth opposite the circuit board mount and another tooth corresponding to the guide or another tooth via the adjacent guide or the circuit board mount as a guide.

9. The electric machine of claim 6, wherein the PCB circuit board has a first recess or a first through hole corresponding to the connector on its outer periphery for the connector to pass through.

10. The electric machine of claim 6, wherein the PCB circuit board has a second recess or a second through hole at its periphery, and the circuit board mounting base further comprises a positioning portion extending from the base portion and inserted into the second recess or the second through hole at its periphery.

11. The electric machine of claim 1, wherein the magnetic core is a stator core and the teeth are stator teeth; the motor includes a rotor mounted in a stator, the rotor including a rotating shaft and a permanent magnet fixed to the rotating shaft.